/*
 * Copyright:  2018 smarabbit studio.
 *
 *  Licensed under the Confluent Community License; you may not use this file
 *  except in compliance with the License.  You may obtain a copy of the License at
 *
 *  http://www.confluent.io/confluent-community-license
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations under the License.
 *
 *  @作   者： 黄开晖 (117227773@qq.com)
 *  @日   期:  2021年11月1日
 */
package com.massyframework.beanskin.runtime.framework.installing.classloading;

import java.net.URL;
import java.util.Enumeration;
import java.util.Objects;
import java.util.function.Function;

/**
 * URL枚举器
 * @author huangkh
 *
 */
final class URLEnumeration implements Enumeration<URL> {

	private Enumeration<URL> em;
	private Function<URL, URL> transformer;
	
	/**
	 * 
	 */
	public URLEnumeration(Enumeration<URL> em, Function<URL, URL> transformer) {
		this.em = Objects.requireNonNull(em, "\"em\" cannot be null.");
		this.transformer = Objects.requireNonNull(transformer, "\"transformer\" cannot be null.");
	}

	@Override
	public boolean hasMoreElements() {
		return this.em.hasMoreElements();
	}

	@Override
	public URL nextElement() {
		URL result = this.em.nextElement();
		result = this.transformer.apply(result);
		return result;
	}

}
